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- W2035607048 abstract "The effect of the prostacyclin-mimetic, iloprost, on the reversibly damaged (stunned) myocardium was studied in barbital-anesthetized, open-chest dogs subjected to 15 minutes of coronary artery occlusion and 3 hours of reperfusion. Regional myocardial segment shortening (%SS) was measured in the subendocardium of nonischemic and ischemic-reperfused areas by sonomicrometry. Iloprost was infused for 30 minutes beginning 15 minutes prior to occlusion (0.05 microgram/kg/min, ILO-LOW, or 0.1 microgram/kg/min, ILO-HIGH) or immediately prior to reperfusion (0.1 microgram/kg/min, ILO-REP). %SS in the ischemic-reperfused region recovered to 3% of pretreatment values in the control (saline-treated) group by 3 hours of reperfusion. In contrast, %SS in the iloprost-treated groups was significantly enhanced versus the control group at all times of reperfusion. At 3 hours of reperfusion, %SS recovered to 43% (ILO-LOW), 58% (ILO-HIGH), and 35% (ILO-REP) of pretreatment values. The beneficial effect on functional recovery was significantly greater when iloprost was administered before occlusion versus immediately prior to reperfusion. Thus, part of the salutory effects of iloprost appear to occur prior to and/or during ischemia. Iloprost did not improve collateral blood flow to the ischemic region or myocardial high energy phosphate content at 3 hours of reperfusion. While iloprost significantly decreased mean arterial pressure during ischemia and early reperfusion, the hypotensive action did not appear to play a role in the amelioration of postischemic dysfunction, as preocclusion treatment with an equihypotensive dose of sodium nitroprusside produced no significant effect on postischemic recovery beyond 5 minutes of reperfusion. Results of in vitro experiments indicated that iloprost had no effect on the xanthine oxidase free-radical generating system including lipid peroxidation. However, iloprost decreased the neutrophil-derived superoxide burst after chemotactic stimulation. This beneficial action may, in part, explain the efficacy of iloprost in enhancing postischemic function of the stunned myocardium." @default.
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- W2035607048 date "1988-02-01" @default.
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- W2035607048 title "Beneficial effects of iloprost in the stunned canine myocardium." @default.
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- W2035607048 doi "https://doi.org/10.1161/01.res.62.2.204" @default.
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